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@TheDreamer The Moonbase is the serial you're thinking of, where the Doctor has to find what is causing the virus affecting most of the staff. The Ice Warriors is where a number of scientists discover a frozen warrior in a glacier and when it wakes, it sets about reanimating the rest of it's frozen warrior army. If you ever get the opportunity, check out The Enemy of the World, too. Troughton plays two roles, that of the Doctor and the main villain, Salamander. It's one of the recently found serials and is absolutely brilliant!
6 months, 4 weeks ago on The Second Doctor: Five Favourites
The problem with opinion pieces is they're always formed on the writers' own opinion of the stories. There's no doubt that all Troughton serials are magnificent (although I'd hesitate calling Space Pirates anything complimentary), but I feel it short changes the character to have his special mentions being all multi-Doctor serials. Surely, fans should be celebrating the utterly genius Enemy of the World as one of Troughton's finest - he DID perform the dual role of antagonist and protagonist, after all - and despite being half-animated, The Moonbase sets up not only how Troughton would play his Doctor for the remainder of his tenure, but also introduce us to the format which would prove so successful time and again for his era. Still, like the original post, this is all opinion anyway!